Cheap Flights from Buffalo (BUF) to Seattle (SEA)

View AU$244 flight on Sat, 4 Oct. 2025Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Buffalo (BUF) to Seattle (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from Buffalo (BUF) to Seattle (SEA)

September is typically the cheapest month to fly

From AU$363 - AU$853 per traveller.

Graph displaying average flight prices per month

Flight from Buffalo to Seattle route information
Origin airport
Buffalo Niagara Intl.
Destination airport
Seattle - Tacoma Intl.
Distance
3385 km

Your quick guide to flights from Buffalo to Seattle

Pick up great flights from Buffalo to Seattle

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Buffalo to Seattle. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Buffalo to Seattle that take around hours.

Find cheap flights from Buffalo to Seattle

From the great flight deals with prices currently ranging from to , you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Buffalo to Seattle around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Seattle is normally in .

Reasons to book your flight from Buffalo to Seattle with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Buffalo to Seattle across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Seattle right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from BUF to Sea-Tac Airport?
Round-trip flights from BUF to Seattle - Tacoma Intl. Airport (SEA) start from . This price is based on fares quoted within the last 7 days on Expedia for flights departing within the next year — book now to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Buffalo Niagara Intl. Airport (BUF) to SEA?
This varies between airlines, as each has its own terms and conditions. Head to the Customer Service Portal, where you'll find instructions on how to cancel your flight online.
How do I find cheap flights from Buffalo Niagara International Airport to Seattle - Tacoma Intl. Airport (SEA) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for BUF to SEA flights, you'll see a "no change fees" filter for you to select.
How far is the flight from BUF to Sea-Tac Airport?
Expect to be cruising at altitude for a while, as the flight distance from Buffalo Niagara International Airport to Seattle - Tacoma Intl. Airport (SEA) is 3 400 kilometres. Create a playlist of your favourite songs before you leave home to stay entertained during the flight.
Which airlines fly direct from BUF to SEA?
Right now, no airlines offer direct flights from BUF to Sea-Tac Airport. You'll have to book a flight with one or more stops. To score the best connections and price, lock in your airfare well in advance.
Are BUF to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Flight tickets from Buffalo Niagara International Airport to Sea-Tac Airport are available up to 12 months before departure on Expedia. And although you may occasionally score fantastic last-minute deals, it's not something you should bank on. Also, booking your flights in advance means you'll have more options — and you can avoid being wedged in the dreaded middle seat! We regularly update our fares to make sure you get the biggest bargains, so check back often for all the latest specials.

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